Java/API Developer

As a Java Developer/API Developer, you will develop, enhance and provide production support for Java-based middleware applications and application programming interfaces (APIs). You will work across Xpress middleware and Code Connect APIs running on WSO2 environments, with a strong focus on application security vulnerability remediation. You will also troubleshoot production incidents, monitor application alerts and participate in a 24x7 on-call rotation every six to eight weeks., * Lead the design and development of customer-requested enhancements and provide production support for Xpress middleware services and legacy middleware components that integrate with core banking systems.

• Develop, enhance and support Code Connect APIs using REST, SOAP, web services, YAML, Swagger definitions, WSO2 API Manager and WSO2 Enterprise Integrator.
• Remediate static-code, open-source and AI-identified security vulnerabilities using Checkmarx One (CxOne) and Mythos across Java and API code.
• Investigate production issues and monitor Splunk and ThousandEyes alerts to help identify application or architecture-related issues.
• Collaborate with other application teams on enhancements, troubleshooting and production support, including responding to escalations and ServiceNow incidents during scheduled on-call coverage., As a Java Developer/API Developer, you will help maintain and enhance middleware and API services used by hosted and non-hosted clients. Your work will strengthen application security through vulnerability remediation while supporting reliable production services. You will also contribute to incident response, troubleshooting and enhancements across interconnected applications and banking platforms.

• 6-10 years of Java development experience with strong object-oriented programming skills; API development experience includes Spring Core, Spring Integration and multi-layered architectures.
• Strong knowledge of REST and SOAP web services, Swagger, YAML, XML, JSON, XML Schema Definition (XSD), JSON Schema and data transformation technologies.
• Experience with relational database management systems, Structured Query Language (SQL), database management systems and Java Database Connectivity (JDBC).
• Working knowledge of application security remediation, including static application security testing and software composition analysis using Checkmarx One (CxOne), as well as addressing vulnerabilities in Java and API code.
• Ability to provide production support and participate in a 24x7 on-call rotation for one week every six to eight weeks., * Experience with Xpress application programming and implementations, including IFX schemas, WebSphere application server configuration and CICS applications.
• Knowledge of WSO2 API Manager, Analytics and Enterprise Integrator, as well as Splunk monitoring.
• Banking industry experience.

Every day at FIS, innovators, problem solvers and changemakers work together to create technology that advances the world of finance. We embrace new ideas, challenge what’s possible and empower our teams to make a lasting impact. If you’re ready to help shape the future of fintech, unlock your next chapter with FIS., When you join FIS, you become part of a team that’s shaping how the world pays, banks and invests. We’re committed to helping you thrive, both professionally and personally. At FIS, we offer you:

• Internal career growth opportunities
• A voice in the future of fintech
• Always-on learning and development
• Collaborative work environment
• Opportunities to give back